Answer:
d
Step-by-step explanation:
Answer:
B
Step-by-step explanation:
Start by breaking down the equation
-1/2 x 10 = -5
-1/2x1/4=-1/4
Then combine your answer
-5=1/8
Use SOH
To find sin=O/H or 5/25
Then use the inverse sin^-1(5/25)
And find the angle
Answer:
Step-by-step explanation:
Is 2
The equation 2cos^2(x) - 1 = 0 we manupulate by adding 1 to both sides and then dividing both sides by 2.
2cos^2(x) - 1 = 0
2cos^2(x) = 1
<span> cos^2(x) = 1/2
</span> cos(x) = ±√1/2
<span> cos(x) = ±√(2)/2 </span>
The answers to your question are <span>A. 3pi/4, B. 15pi/4, and D. </span>-7pi/4 as they all are angles with a reference angle of pi/4. They will have a cosine ratio of <span>√(2)/2 or </span><span><span>-</span>√(2)/2</span>